PLATE 14 

 Early Tertiary Tectonic Map 



Laramide uplifts and basins not shown except for Green River Lake in Utah, 

 Colorado, and Wyoming, and Uinta Range, although thick Eocene deposits 

 accumulated in most of them. The Rocky Mountain front is a result of previous 

 orogeny. The volcanics are Eocene, Oligocene, and in places Miocene in age; 

 most Miocene volcanics, however, are shown on Plate 15. Numerous volcanic 

 cones, not shown, were built in the eastern Pacific and the Gulf of California. 





